diff --git a/core/src/fr/evolving/UI/ButtonLevel.java b/core/src/fr/evolving/UI/ButtonLevel.java
index 07e30df..805c7ba 100644
--- a/core/src/fr/evolving/UI/ButtonLevel.java
+++ b/core/src/fr/evolving/UI/ButtonLevel.java
@@ -14,16 +14,18 @@ import fr.evolving.automata.Level;
 public class ButtonLevel extends ImageTextButton {
 	public Level level;
 	public boolean Activated;
-	TextureRegion Finalled, Locked;
-	Label Thelabel;
-	float scale;
-	float ratio;
-	ImageTextButtonStyle style;
-	LabelStyle stylelabel;
+	private TextureRegion Finalled, Locked;
+	private Label Thelabel;
+	private float scale;
+	private float ratio;
+	private ImageTextButtonStyle style;
+	private LabelStyle stylelabel;
+	private boolean modifyxy;
 
-	public ButtonLevel(Level level, boolean Activated, float ratio) {
+	public ButtonLevel(Level level, boolean Activated, float ratio, boolean modifyxy) {
 		super(level.Name, AssetLoader.Skin_level, "world"
 				+ String.valueOf(level.aWorld));
+		this.modifyxy=modifyxy;
 		this.level = level;
 		this.ratio = ratio;
 		this.Activated = Activated;
@@ -70,11 +72,12 @@ public class ButtonLevel extends ImageTextButton {
 	@Override
 	public void setPosition(float x, float y) {
 		super.setPosition(x, y);
-		level.X = x;
-		level.Y = y;
+		if (modifyxy) {
+			level.X = x;
+			level.Y = y/ratio;
+		}
 		Thelabel.setColor(level.X / 1024f, level.X / 1024f, level.X / 1024f, 1f);
-		Thelabel.setPosition(level.X + 54 * scale,
-				level.Y * ratio + 20 * scale, Align.bottom | Align.center);
+		Thelabel.setPosition(x + 54 * scale,y  + 20 * scale, Align.bottom | Align.center);
 		this.setColor(1f, 0.47f + (float) level.X / 1024f * 0.529f,
 				0.607f + (float) level.X / 768f * 0.392f, 1f);
 	}
@@ -83,15 +86,15 @@ public class ButtonLevel extends ImageTextButton {
 	public void draw(Batch batch, float parentAlpha) {
 		super.draw(batch, parentAlpha);
 		if (level.Special) {
-			batch.draw(Finalled, level.X, level.Y * ratio,
+			batch.draw(Finalled, getX(), getY() ,
 					Finalled.getRegionWidth() * scale,
 					Finalled.getRegionHeight() * scale);
 		}
 		if (!Activated) {
 			batch.draw(
 					Locked,
-					level.X + this.getWidth() - Locked.getRegionWidth(),
-					level.Y * ratio + this.getHeight()
+					getX() + this.getWidth() - Locked.getRegionWidth(),
+					getY() + this.getHeight()
 							- Locked.getRegionHeight(), Locked.getRegionWidth()
 							* scale, Locked.getRegionHeight() * scale);
 		}
diff --git a/core/src/fr/evolving/UI/Worldlist.java b/core/src/fr/evolving/UI/Worldlist.java
index e790db2..f572678 100644
--- a/core/src/fr/evolving/UI/Worldlist.java
+++ b/core/src/fr/evolving/UI/Worldlist.java
@@ -16,7 +16,7 @@ public class Worldlist extends List {
 	public void Refresh() {
 		Array<String> worlds = null;
 		if (AssetLoader.Datahandler.game() != null)
-			worlds = AssetLoader.Datahandler.game().getworlds();
+			worlds = AssetLoader.Datahandler.game().getCampaigns();
 		if (worlds == null)
 			worlds = new Array<String>();
 		this.setItems(worlds);
diff --git a/core/src/fr/evolving/assets/AssetLoader.java b/core/src/fr/evolving/assets/AssetLoader.java
index c2be48a..2e584b3 100644
--- a/core/src/fr/evolving/assets/AssetLoader.java
+++ b/core/src/fr/evolving/assets/AssetLoader.java
@@ -225,7 +225,6 @@ public class AssetLoader {
 		Datahandler.RegisterBackend(LocalBase.class);
 		Datahandler.RegisterBackend(SqlBase.class);
 		Databasemanagerfrompref();
-		Gdx.app.log("init", "Ok");
 	}
 
 	public static void Databasemanagerfrompref() {
diff --git a/core/src/fr/evolving/automata/Insufler100.java b/core/src/fr/evolving/automata/Insufler100.java
index 272fa5e..3ca6015 100644
--- a/core/src/fr/evolving/automata/Insufler100.java
+++ b/core/src/fr/evolving/automata/Insufler100.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Insufler100 extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -119,19 +120,6 @@ public class Insufler100 extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -218,15 +206,7 @@ public class Insufler100 extends Transmuter {
 	public int getResearch() {
 		return Research;
 	}
-
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
+	
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -295,7 +275,7 @@ public class Insufler100 extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Insufler33.java b/core/src/fr/evolving/automata/Insufler33.java
index 076631e..92a227d 100644
--- a/core/src/fr/evolving/automata/Insufler33.java
+++ b/core/src/fr/evolving/automata/Insufler33.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Insufler33 extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -49,7 +50,8 @@ public class Insufler33 extends Transmuter {
 		this.Technology = 3;
 		this.Research = 0;
 		this.Upgrade = null;
-		this.Unlock = new Insufler50(null);
+		this.Unlock = new Array<Transmuter>();
+		this.Unlock.add(new Insufler50(null));
 		this.showed = false;
 		this.CanUpgradeTemp = true;
 		this.CanUpgradeCycle = false;
@@ -119,19 +121,6 @@ public class Insufler33 extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -219,14 +208,6 @@ public class Insufler33 extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -295,7 +276,7 @@ public class Insufler33 extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Insufler50.java b/core/src/fr/evolving/automata/Insufler50.java
index e1c5930..0d32854 100644
--- a/core/src/fr/evolving/automata/Insufler50.java
+++ b/core/src/fr/evolving/automata/Insufler50.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Insufler50 extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -49,7 +50,8 @@ public class Insufler50 extends Transmuter {
 		this.Technology = 3;
 		this.Research = 120;
 		this.Upgrade = null;
-		this.Unlock = new Insufler100(null);
+		this.Unlock = new Array<Transmuter>();
+		this.Unlock.add(new Insufler100(null));
 		this.showed = false;
 		this.CanUpgradeTemp = true;
 		this.CanUpgradeCycle = false;
@@ -119,19 +121,6 @@ public class Insufler50 extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -218,15 +207,7 @@ public class Insufler50 extends Transmuter {
 	public int getResearch() {
 		return Research;
 	}
-
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
+	
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -295,7 +276,7 @@ public class Insufler50 extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Inverter_I.java b/core/src/fr/evolving/automata/Inverter_I.java
index 4a555ad..7583ee3 100644
--- a/core/src/fr/evolving/automata/Inverter_I.java
+++ b/core/src/fr/evolving/automata/Inverter_I.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Inverter_I extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -103,19 +104,6 @@ public class Inverter_I extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -203,14 +191,6 @@ public class Inverter_I extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -279,7 +259,7 @@ public class Inverter_I extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Inverter_II.java b/core/src/fr/evolving/automata/Inverter_II.java
index 3c5deed..8659dd6 100644
--- a/core/src/fr/evolving/automata/Inverter_II.java
+++ b/core/src/fr/evolving/automata/Inverter_II.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Inverter_II extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -103,19 +104,6 @@ public class Inverter_II extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -203,14 +191,6 @@ public class Inverter_II extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -279,7 +259,7 @@ public class Inverter_II extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Level.java b/core/src/fr/evolving/automata/Level.java
index b937d86..45bd721 100644
--- a/core/src/fr/evolving/automata/Level.java
+++ b/core/src/fr/evolving/automata/Level.java
@@ -25,6 +25,7 @@ public class Level implements Serializable {
 	public int Maxtemp;
 	public int Maxrayon;
 	public int Maxnrj;
+	public int Research;
 	public boolean Special;
 	public String Tuto;
 	public int[][] Link;
diff --git a/core/src/fr/evolving/automata/Negativer.java b/core/src/fr/evolving/automata/Negativer.java
index 1a1b8d2..4a7e252 100644
--- a/core/src/fr/evolving/automata/Negativer.java
+++ b/core/src/fr/evolving/automata/Negativer.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Negativer extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -103,19 +104,6 @@ public class Negativer extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -203,14 +191,6 @@ public class Negativer extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -279,7 +259,7 @@ public class Negativer extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Negativer_I.java b/core/src/fr/evolving/automata/Negativer_I.java
index 64f0dba..ef7bb3f 100644
--- a/core/src/fr/evolving/automata/Negativer_I.java
+++ b/core/src/fr/evolving/automata/Negativer_I.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Negativer_I extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -105,19 +106,6 @@ public class Negativer_I extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -205,14 +193,6 @@ public class Negativer_I extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -281,7 +261,7 @@ public class Negativer_I extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Negativer_II.java b/core/src/fr/evolving/automata/Negativer_II.java
index d63fc06..b988bd1 100644
--- a/core/src/fr/evolving/automata/Negativer_II.java
+++ b/core/src/fr/evolving/automata/Negativer_II.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Negativer_II extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -105,19 +106,6 @@ public class Negativer_II extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -205,14 +193,6 @@ public class Negativer_II extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -281,7 +261,7 @@ public class Negativer_II extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Negativer_III.java b/core/src/fr/evolving/automata/Negativer_III.java
index f5cc1e9..244ac17 100644
--- a/core/src/fr/evolving/automata/Negativer_III.java
+++ b/core/src/fr/evolving/automata/Negativer_III.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Negativer_III extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -103,19 +104,6 @@ public class Negativer_III extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -203,14 +191,6 @@ public class Negativer_III extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -279,7 +259,7 @@ public class Negativer_III extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Neutraliser_I.java b/core/src/fr/evolving/automata/Neutraliser_I.java
index 571a5ad..3594f7c 100644
--- a/core/src/fr/evolving/automata/Neutraliser_I.java
+++ b/core/src/fr/evolving/automata/Neutraliser_I.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Neutraliser_I extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -103,19 +104,6 @@ public class Neutraliser_I extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -203,14 +191,6 @@ public class Neutraliser_I extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -279,7 +259,7 @@ public class Neutraliser_I extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Neutraliser_II.java b/core/src/fr/evolving/automata/Neutraliser_II.java
index 020720a..b7697ae 100644
--- a/core/src/fr/evolving/automata/Neutraliser_II.java
+++ b/core/src/fr/evolving/automata/Neutraliser_II.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Neutraliser_II extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -103,19 +104,6 @@ public class Neutraliser_II extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -203,14 +191,6 @@ public class Neutraliser_II extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -279,7 +259,7 @@ public class Neutraliser_II extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Oneway.java b/core/src/fr/evolving/automata/Oneway.java
index bb21fe5..f56f085 100644
--- a/core/src/fr/evolving/automata/Oneway.java
+++ b/core/src/fr/evolving/automata/Oneway.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Oneway extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -49,7 +50,8 @@ public class Oneway extends Transmuter {
 		this.Technology = 5;
 		this.Research = 0;
 		this.Upgrade = null;
-		this.Unlock = new distributor(level);
+		this.Unlock = new Array<Transmuter>();
+		this.Unlock.add(new distributor(level));
 		this.showed = false;
 		this.CanUpgradeTemp = true;
 		this.CanUpgradeCycle = false;
@@ -103,19 +105,6 @@ public class Oneway extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -203,14 +192,6 @@ public class Oneway extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -279,7 +260,7 @@ public class Oneway extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Positiver.java b/core/src/fr/evolving/automata/Positiver.java
index 5c48db6..e5912e9 100644
--- a/core/src/fr/evolving/automata/Positiver.java
+++ b/core/src/fr/evolving/automata/Positiver.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Positiver extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -103,19 +104,6 @@ public class Positiver extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -203,14 +191,6 @@ public class Positiver extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -279,7 +259,7 @@ public class Positiver extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Positiver_I.java b/core/src/fr/evolving/automata/Positiver_I.java
index b435cf5..1591c73 100644
--- a/core/src/fr/evolving/automata/Positiver_I.java
+++ b/core/src/fr/evolving/automata/Positiver_I.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Positiver_I extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -105,19 +106,6 @@ public class Positiver_I extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -205,14 +193,6 @@ public class Positiver_I extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -281,7 +261,7 @@ public class Positiver_I extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Positiver_II.java b/core/src/fr/evolving/automata/Positiver_II.java
index eab4557..9eb1c1e 100644
--- a/core/src/fr/evolving/automata/Positiver_II.java
+++ b/core/src/fr/evolving/automata/Positiver_II.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class Positiver_II extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -105,19 +106,6 @@ public class Positiver_II extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Upgrade.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -205,14 +193,6 @@ public class Positiver_II extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -281,7 +261,7 @@ public class Positiver_II extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Positiver_III.java b/core/src/fr/evolving/automata/Positiver_III.java
index f99309a..633fd16 100644
--- a/core/src/fr/evolving/automata/Positiver_III.java
+++ b/core/src/fr/evolving/automata/Positiver_III.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -15,7 +16,7 @@ public class Positiver_III extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -102,19 +103,6 @@ public class Positiver_III extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
-
 	public void Activate() {
 		if (this.Activable)
 			ActivationLevel = this.getMaxActivationLevel();
@@ -202,14 +190,6 @@ public class Positiver_III extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -278,7 +258,7 @@ public class Positiver_III extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/automata/Transmuter.java b/core/src/fr/evolving/automata/Transmuter.java
index 0a0a718..5876373 100644
--- a/core/src/fr/evolving/automata/Transmuter.java
+++ b/core/src/fr/evolving/automata/Transmuter.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.io.Serializable;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Entries;
 import com.badlogic.gdx.utils.ObjectMap.Entry;
 import com.badlogic.gdx.utils.ObjectMap.Values;
@@ -39,8 +40,8 @@ public abstract class Transmuter implements Cloneable, Serializable {
 		A00, A90, A180, A270
 	};
 
-	protected Level level;
-	protected Angular Rotation;
+	protected transient Level level;
+	protected transient Angular Rotation;
 
 	public Transmuter(Level level) {
 		this.level = level;
@@ -69,12 +70,6 @@ public abstract class Transmuter implements Cloneable, Serializable {
 	public void Run() {
 	}
 
-	public void Unlock() {
-	}
-
-	public void Upgrade() {
-	}
-
 	public void Activate() {
 	}
 
@@ -133,12 +128,42 @@ public abstract class Transmuter implements Cloneable, Serializable {
 	public int getResearch() {
 		return 0;
 	}
-
-	public boolean isUpgradable() {
-		return false;
+	
+	public void Unlock(Transmuter transmuter) {
+		Array<Transmuter> transmuters=this.getUnlock();
+		if (transmuters != null) {
+			for(Transmuter transmuter2:transmuters) {
+				if (transmuter2==transmuter)
+					transmuter.SetShowed(true);
+			}
+		}
+	}
+	
+	public void Unlock() {
+		this.SetShowed(true);
 	}
 
-	public boolean isUnlockable() {
+	public void Upgrade() {
+		Transmuter transmuter=this.getUpgrade();
+		if (transmuter == null)
+			return;
+		transmuter.SetShowed(true);
+		this.SetShowed(false);
+	}
+
+	public boolean isUpgradable(int value) {
+		Transmuter transmuter=this.getUpgrade();
+		return transmuter!= null && !transmuter.isShowed() && transmuter.getResearch()>=value;
+	}
+
+	public boolean isUnlockable(int value) {
+		Array<Transmuter> transmuters=this.getUnlock();
+		if (transmuters != null) {
+			for(Transmuter transmuter:transmuters) {
+				if (!transmuter.isShowed() && transmuter.getResearch()>=value)
+					return true;
+			}
+		}
 		return false;
 	}
 
@@ -173,7 +198,7 @@ public abstract class Transmuter implements Cloneable, Serializable {
 		return null;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return null;
 	}
 
@@ -242,11 +267,11 @@ public abstract class Transmuter implements Cloneable, Serializable {
 				+ " Visible:"
 				+ this.isShowed()
 				+ "\nUpgradable:"
-				+ ((this.isUpgradable()) ? this.getUpgrade().getName() : this
-						.isUpgradable())
+				+ ((this.isUpgradable(0)) ? this.getUpgrade().getName() : this
+						.isUpgradable(0))
 				+ " Unlockable:"
-				+ ((this.isUnlockable()) ? this.getUnlock().getName() : this
-						.isUnlockable()) + "\nUpgrade Cycle:"
+				+ ((this.isUnlockable(0)) ? this.getUnlock().size : this
+						.isUnlockable(0)) + "\nUpgrade Cycle:"
 				+ this.getUpgradeCycle() + " upgrade:"
 				+ this.isUpgradableCycle() + "\nUpgrade Temperature:"
 				+ this.getUpgradeTemp() + " upgrade:" + this.isUpgradableTemp()
diff --git a/core/src/fr/evolving/automata/Worlds.java b/core/src/fr/evolving/automata/Worlds.java
new file mode 100644
index 0000000..6a1f409
--- /dev/null
+++ b/core/src/fr/evolving/automata/Worlds.java
@@ -0,0 +1,192 @@
+package fr.evolving.automata;
+
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.scenes.scene2d.Actor;
+import com.badlogic.gdx.scenes.scene2d.utils.ChangeListener.ChangeEvent;
+import com.badlogic.gdx.utils.Array;
+
+import fr.evolving.assets.AssetLoader;
+import fr.evolving.assets.InitWorlds;
+import fr.evolving.assets.Preference;
+
+public class Worlds extends Actor {
+	private ChangeEvent event;
+	private Array<Level> levels;
+	private String name;
+	private int usedworld;
+	private Level usedlevel;
+	private Array<Transmuter> Transmuters;
+	private State state;
+	
+	public enum State {pause,simulating,notloaded,databasefailed};
+	
+	public Worlds(String campaign) {
+		name=campaign;
+		init();
+	}
+	
+	public void init() {
+		levels=null;
+		usedworld=-1;
+		usedlevel=null;
+		if (!AssetLoader.Datahandler.verifyall()) {
+			Gdx.app.debug(getClass().getSimpleName(),"Pilotes de bases de donnée défaillant.");
+			state=State.databasefailed;
+		}
+		else
+			state=State.notloaded;
+		this.load(name);
+		if (state==State.notloaded)
+			this.init(name);
+		onchanged();
+	}	
+	
+	public void SaveGrid() {
+		if (usedlevel!=null)
+			AssetLoader.Datahandler.user().setGrid(0, usedlevel.id, usedlevel.Grid);
+	}
+	
+	public void SaveLastGrid() {
+		if (usedlevel!=null)
+			AssetLoader.Datahandler.user().setGrid(0, usedlevel.id, "LAST",	usedlevel.Grid);
+	}
+	
+	public void Forcereload() {
+		onchanged();
+	}
+	
+	public void onchanged() {
+		ChangeEvent event=new ChangeEvent();
+		event.setTarget(this);
+		event.setListenerActor(this);	
+		event.setStage(this.getStage());
+		if (event.getStage()!=null) 
+			this.fire(event);
+	}
+	
+	public Array<Level> getLevels() {
+		Array<Level> tempworld=new Array<Level>();
+		if (state!=State.notloaded && this.levels!=null)
+		{
+			for(Level level:levels)
+				if (level!=null && level.aWorld==usedworld)
+					tempworld.add(level);
+			return tempworld;
+		}
+		else
+			return null;
+	}
+	
+	public State getState() {
+		return state;
+	}
+	
+	public void setLevel(int alevel) {
+		if (state!=State.notloaded)
+		if (usedworld>=0) {
+			Array<Level> tempworld=getLevels();
+			for(Level level:tempworld)
+				if (level.aLevel==alevel)
+				{
+					usedlevel=level;
+					return;
+				}
+		}
+	}
+	
+	public Level getInformations() {
+		return usedlevel;
+	}
+	
+	public int getLevel() {
+		return usedlevel.aLevel;
+	}
+	
+	public void delLevel() {
+		usedlevel=null;
+	}
+	
+	public void setWorld(int world) {
+		if (state!=State.notloaded)
+		if (world<getMaxWorlds()) {
+			usedworld=world;
+			onchanged();
+		}
+	}
+	
+	public void NextWorld() {
+		if (state!=State.notloaded)
+		if (usedworld<getMaxWorlds()-1) {
+			usedworld++;
+			onchanged();
+		}
+	}
+	
+	public void PreviousWorld() {
+		if (state!=State.notloaded)
+		if (usedworld>0) {
+			usedworld--;
+			onchanged();
+		}
+	}
+	
+	public int getWorld() {
+		if (state!=State.notloaded)
+			return usedworld;
+		else
+			return -1;
+	}
+	
+	public void set(String campaign) {
+		Gdx.app.log("*****", "Définition de la compagne "+campaign);
+		Preference.prefs.putString("world", campaign);
+		Preference.prefs.flush();
+		load(campaign);
+	}
+	
+	public void load(String campaign) {
+		Gdx.app.log("*****", "Chargement de la compagne "+campaign);
+		levels=AssetLoader.Datahandler.game().getCampaign(campaign);
+		name=campaign;
+		if (levels==null)
+
+		{
+			state=State.notloaded;
+		}
+		else
+			state=State.pause;
+	}
+	
+	public void init(String campaign) {
+		Gdx.app.log("*****", "initialisation de la compagne "+campaign);
+		try {
+			levels=InitWorlds.go();
+			Preference.prefs.putString("world",campaign);
+			Preference.prefs.flush();
+			name=campaign;
+			AssetLoader.Datahandler.game().setCampaign(levels,name);
+			state=State.pause;
+		}
+		catch (Exception e) {
+			state=State.notloaded;
+		}
+	}
+	
+	public void save(String campaign) {
+		Gdx.app.log("*****", "enregistrement de la compagne "+campaign);
+		AssetLoader.Datahandler.game().setCampaign(levels,campaign);
+	}
+	
+	public int getMaxWorlds() {
+		int max = 0;
+		for (Level level : levels)
+			if (level != null && level.aWorld > max)
+				max = level.aWorld;
+		return max;
+	}
+	
+	public String getName() {
+		return this.name;
+	}
+
+}
diff --git a/core/src/fr/evolving/automata/distributor.java b/core/src/fr/evolving/automata/distributor.java
index 783f1ed..6d94c4f 100644
--- a/core/src/fr/evolving/automata/distributor.java
+++ b/core/src/fr/evolving/automata/distributor.java
@@ -3,6 +3,7 @@ package fr.evolving.automata;
 import java.util.Iterator;
 
 import com.badlogic.gdx.math.Vector2;
+import com.badlogic.gdx.utils.Array;
 import com.badlogic.gdx.utils.ObjectMap.Values;
 import com.badlogic.gdx.utils.OrderedMap;
 
@@ -16,7 +17,7 @@ public class distributor extends Transmuter {
 	private static int Technology;
 	private static int Research;
 	private static Transmuter Upgrade;
-	private static Transmuter Unlock;
+	private static Array<Transmuter> Unlock;
 	private static boolean showed;
 	private static boolean CanUpgradeTemp;
 	private static boolean CanUpgradeCycle;
@@ -111,18 +112,6 @@ public class distributor extends Transmuter {
 		this.level.Nrj += UsedNrj * UpgradedNrj;
 	}
 
-	public void Unlock() {
-		if (this.Unlock == null)
-			return;
-		this.Unlock.SetShowed(true);
-	}
-
-	public void Upgrade() {
-		if (this.Upgrade == null)
-			return;
-		this.Unlock.SetShowed(true);
-		this.SetShowed(false);
-	}
 
 	public void Activate() {
 		if (this.Activable)
@@ -211,14 +200,6 @@ public class distributor extends Transmuter {
 		return Research;
 	}
 
-	public boolean isUpgradable() {
-		return this.Upgrade != null && this.Upgrade.isShowed();
-	}
-
-	public boolean isUnlockable() {
-		return this.Unlock != null && this.Unlock.isShowed();
-	}
-
 	public boolean isShowed() {
 		return this.showed;
 	}
@@ -287,7 +268,7 @@ public class distributor extends Transmuter {
 		return this.Upgrade;
 	}
 
-	public Transmuter getUnlock() {
+	public Array<Transmuter> getUnlock() {
 		return this.Unlock;
 	}
 
diff --git a/core/src/fr/evolving/database/Base.java b/core/src/fr/evolving/database/Base.java
index 97270d7..2102c42 100644
--- a/core/src/fr/evolving/database/Base.java
+++ b/core/src/fr/evolving/database/Base.java
@@ -23,28 +23,28 @@ public abstract class Base {
 
 	// Gestion type Gamebase
 
-	public Array<String> getworlds() {
+	public Array<String> getCampaigns() {
 		return null;
 	}
 
-	public Array<Level> getworld(String description) {
+	public Array<Level> getCampaign(String description) {
 		return null;
 	}
 
-	public boolean setworld(Array<Level> world, String description) {
+	public boolean setCampaign(Array<Level> campaign, String description) {
 		return false;
 	}
 
-	public boolean deleteworld(String description) {
+	public boolean deleteCampaign(String description) {
 		return false;
 	}
 
 	// Gestion type Userbase
-	public boolean getlevellock(int user, int level) {
+	public boolean getLevellock(int user, int level) {
 		return false;
 	}
 
-	public boolean setlevelunlock(int user, int level) {
+	public boolean setLevelunlock(int user, int level) {
 		return false;
 	}
 
@@ -99,7 +99,7 @@ public abstract class Base {
 	public void Close() {
 	}
 
-	public String getprefix() {
+	public String getPrefix() {
 		return "";
 	}
 
diff --git a/core/src/fr/evolving/database/DatabaseManager.java b/core/src/fr/evolving/database/DatabaseManager.java
index 1245617..10979d6 100644
--- a/core/src/fr/evolving/database/DatabaseManager.java
+++ b/core/src/fr/evolving/database/DatabaseManager.java
@@ -71,7 +71,7 @@ public class DatabaseManager {
 			Base back;
 			try {
 				back = (Base) classe.newInstance();
-				if (back.getprefix().equals(Type)) {
+				if (back.getPrefix().equals(Type)) {
 					back = (Base) classe.getDeclaredConstructor(cArg)
 							.newInstance(model, Url);
 					return back;
@@ -92,7 +92,7 @@ public class DatabaseManager {
 			Base back;
 			try {
 				back = (Base) classe.newInstance();
-				if (back.getprefix().equals(Type))
+				if (back.getPrefix().equals(Type))
 					return true;
 			} catch (InstantiationException | IllegalAccessException
 					| IllegalArgumentException | SecurityException e) {
diff --git a/core/src/fr/evolving/database/LocalBase.java b/core/src/fr/evolving/database/LocalBase.java
index 7a47ea3..8343f83 100644
--- a/core/src/fr/evolving/database/LocalBase.java
+++ b/core/src/fr/evolving/database/LocalBase.java
@@ -101,7 +101,7 @@ public class LocalBase extends Base {
 
 	// Gestion model type gamedata
 
-	public Array<String> getworlds() {
+	public Array<String> getCampaigns() {
 		DatabaseCursor cursor = null;
 		try {
 			cursor = dbHandler.rawQuery("select desc,date from worlds;");
@@ -114,7 +114,7 @@ public class LocalBase extends Base {
 		return returnvalue;
 	}
 
-	public Array<Level> getworld(String description) {
+	public Array<Level> getCampaign(String description) {
 		DatabaseCursor cursor = null;
 		try {
 			cursor = dbHandler
@@ -138,7 +138,7 @@ public class LocalBase extends Base {
 		return null;
 	}
 
-	public boolean deleteworld(String description) {
+	public boolean deleteCampaign(String description) {
 		try {
 			dbHandler.rawQuery("delete from worlds where desc='" + description
 					+ "';");
@@ -148,7 +148,7 @@ public class LocalBase extends Base {
 		return true;
 	}
 
-	public boolean setworld(Array<Level> world, String description) {
+	public boolean setCampaign(Array<Level> world, String description) {
 		String encoded = "";
 		try {
 			ByteArrayOutputStream bos = new ByteArrayOutputStream();
@@ -169,7 +169,7 @@ public class LocalBase extends Base {
 
 	// Gestion de données type userdata
 
-	public boolean getlevellock(int user, int level) {
+	public boolean getLevellock(int user, int level) {
 		DatabaseCursor cursor = null;
 		try {
 			cursor = dbHandler.rawQuery("select user from locks where user="
@@ -183,7 +183,7 @@ public class LocalBase extends Base {
 			return false;
 	}
 
-	public boolean setlevelunlock(int user, int level) {
+	public boolean setLevelunlock(int user, int level) {
 		try {
 			dbHandler.rawQuery("insert into locks (user,level) values (" + user
 					+ "," + level + ");");
@@ -317,29 +317,19 @@ public class LocalBase extends Base {
 	public boolean setGrid(int user, int level, Grid data) {
 		String encoded = "";
 		try {
-			Gdx.app.log("Base", "Infos:"+user+","+level);
 			ByteArrayOutputStream bos = new ByteArrayOutputStream();
-			Gdx.app.log("Base", "CK1");
 			ObjectOutputStream oos = new ObjectOutputStream(bos);
-			Gdx.app.log("Base", "CK2");
 			oos.writeObject(data);
-			Gdx.app.log("Base", "CK3");
 			oos.flush();
-			Gdx.app.log("Base", "CK4");
 			oos.close();
 			bos.close();
 			byte[] bytes = bos.toByteArray();
-			Gdx.app.log("Base", "size"+bytes.length);
-			encoded = Base64Coder.encodeLines(bytes);
-			Gdx.app.log("Base", "size2"+encoded.length());			
+			encoded = Base64Coder.encodeLines(bytes);			
 			dbHandler.rawQuery("insert into grids (user,level,object) values ("
 					+ user + "," + level + ",'" + encoded + "');");
-			Gdx.app.log("Base", "CK5");	
 		} catch (Exception e) {
-			Gdx.app.log("Base", "cancel");
 			return false;
 		}
-		Gdx.app.log("Base", "Ok");
 		return true;
 	}
 
@@ -419,7 +409,7 @@ public class LocalBase extends Base {
 		}
 	}
 
-	public String getprefix() {
+	public String getPrefix() {
 		return "local";
 	}
 
diff --git a/core/src/fr/evolving/database/SqlBase.java b/core/src/fr/evolving/database/SqlBase.java
index cb1aabb..853dc73 100644
--- a/core/src/fr/evolving/database/SqlBase.java
+++ b/core/src/fr/evolving/database/SqlBase.java
@@ -9,7 +9,7 @@ public class SqlBase extends Base {
 	public SqlBase() {
 	}
 
-	public String getprefix() {
+	public String getPrefix() {
 		return "mysql";
 	}
 
diff --git a/core/src/fr/evolving/renderers/LevelRenderer.java b/core/src/fr/evolving/renderers/LevelRenderer.java
index 057008b..078d2af 100644
--- a/core/src/fr/evolving/renderers/LevelRenderer.java
+++ b/core/src/fr/evolving/renderers/LevelRenderer.java
@@ -27,10 +27,6 @@ public class LevelRenderer {
 	BitmapFont font;
 	String reward,goal,ressource,handicap;
 	
-	
-	
-
-
 	public LevelRenderer(LevelScreen LevelScreen) {
 		this.reward=AssetLoader.language.get("[reward-levelscreen]");
 		this.goal=AssetLoader.language.get("[goal-levelscreen]");
@@ -71,8 +67,8 @@ public class LevelRenderer {
 	public void render(float delta, float runTime) {
 		Gdx.gl.glClearColor(0, 0, 0, 1);
 		Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);
-		if (LevelScreen.world >= 0)
-			font.setColor(AssetLoader.Levelcolors[LevelScreen.world]);
+		if (LevelScreen.worlds.getWorld() >= 0)
+			font.setColor(AssetLoader.Levelcolors[LevelScreen.worlds.getWorld()]);
 		batcher.begin();
 		batcher.setProjectionMatrix(AssetLoader.Camera.combined);
 		batcher.setColor(0.25f, 0.25f, 0.25f, 1f);
diff --git a/core/src/fr/evolving/screens/GameScreen.java b/core/src/fr/evolving/screens/GameScreen.java
index 41a4e58..b9269da 100644
--- a/core/src/fr/evolving/screens/GameScreen.java
+++ b/core/src/fr/evolving/screens/GameScreen.java
@@ -67,6 +67,7 @@ import fr.evolving.automata.Neutraliser_II;
 import fr.evolving.automata.Transmuter;
 import fr.evolving.automata.Transmuter.Angular;
 import fr.evolving.automata.Transmuter.CaseType;
+import fr.evolving.automata.Worlds;
 import fr.evolving.renderers.GameRenderer;
 
 public class GameScreen implements Screen {
@@ -105,6 +106,7 @@ public class GameScreen implements Screen {
 	private Label fpsLabel, info_nom;
 	private TextArea info_desc, tooltip;
 	public boolean unroll;
+	private Worlds worlds;
 
 	public enum calling {
 		mouseover, mouseclick, mousedrag, longpress, tap, taptap, zoom, fling, pan, pinch
@@ -198,13 +200,12 @@ public class GameScreen implements Screen {
 	GestureDetector gesturedetector;
 
 	// This is the constructor, not the class declaration
-	public GameScreen(Level alevel) {
+	public GameScreen(Worlds aworlds) {
 		Gdx.app.log("game", "Ok");
-		this.level = alevel;
-		Gdx.app.debug(getClass().getSimpleName(),
-				"Récupération des derniers niveaux.");
-		this.level.Grid = AssetLoader.Datahandler.user().getGrid(0,
-				this.level.id, "LAST");
+		this.worlds = aworlds;
+		this.level=worlds.getInformations();
+		Gdx.app.debug(getClass().getSimpleName(),"Récupération des derniers niveaux.");
+		this.level.Grid = AssetLoader.Datahandler.user().getGrid(0,	this.level.id, "LAST");
 		if (this.level.Grid == null) {
 			Gdx.app.debug(getClass().getSimpleName(), "Copie monde original.");
 			this.level.Grid = this.level.Grid_orig;
@@ -223,7 +224,6 @@ public class GameScreen implements Screen {
 				Gdx.app.debug("Barre", "Element changé");
 				hideInfo();
 				map.tempclear();
-				//map.fillempty(60);
 				menu.unSelect();
 				map.setSelected(getselected());
 			}
@@ -244,8 +244,7 @@ public class GameScreen implements Screen {
 		Gdx.app.debug(getClass().getSimpleName(), "Création des barres");
 		tooltip = new TextArea("tooltip:x\r\n tooltip:y",AssetLoader.Skin_level, "info_tooltip");
 		tooltip.setBounds(541, 27, 100, 50);
-		Gdx.app.debug(getClass().getSimpleName(),
-				"Création de la barre de gestion du haut");
+		Gdx.app.debug(getClass().getSimpleName(),"Création de la barre de gestion du haut");
 		cycle = new ImageTextButton(String.valueOf(level.Cycle),AssetLoader.Skin_level, "cycle2");
 		cycle.setVisible(level.aWorld>=1);
 		cycle.setPosition(10, AssetLoader.height - 74);
@@ -271,7 +270,7 @@ public class GameScreen implements Screen {
 		objectives.setVictory(level.Victory);
 		objectives.setPosition(890, AssetLoader.height - 95);
 		objectives.setVisible(level.Cout>0);
-		buttonlevel = new ButtonLevel(level, true, 1.0f);
+		buttonlevel = new ButtonLevel(level, true, 1.0f, false);
 		buttonlevel.setPosition(1760, AssetLoader.height - 125);
 		buttonlevel.addListener(new ClickListener() {
 			@Override
@@ -328,7 +327,7 @@ public class GameScreen implements Screen {
 		info_up.addListener(new ClickListener() {
 			@Override
 			public void clicked(InputEvent event, float x, float y) {
-				if (menu.getTransmuter()!=null && menu.getTransmuter().isUpgradable())
+				if (menu.getTransmuter()!=null && menu.getTransmuter().isUpgradable(0))
 					menu.getTransmuter().Upgrade();
 			}
 		});
@@ -352,7 +351,6 @@ public class GameScreen implements Screen {
 				menu.NextPage();
 				Gdx.app.debug("menu", "Page suivante:"+menu.getPage());
 				map.tempclear();
-				//map.fillempty(53);
 				hideInfo();
 				nextpage.setDisabled(menu.isNextEmpty());
 				previouspage.setDisabled(menu.isPreviousEmpty());
@@ -368,7 +366,6 @@ public class GameScreen implements Screen {
 				menu.PreviousPage();
 				Gdx.app.debug("menu", "Page précédente:"+menu.getPage());
 				map.tempclear();
-				//map.fillempty(53);
 				hideInfo();
 				nextpage.setDisabled(menu.isNextEmpty());
 				previouspage.setDisabled(menu.isPreviousEmpty());
@@ -383,7 +380,6 @@ public class GameScreen implements Screen {
 				Gdx.app.debug("Menu", "Element changé");
 				hideInfo();
 				map.tempclear();
-				//map.fillempty(60);
 				if (menu.getTransmuter() != null) 
 					showInfo(menu.getTransmuter());
 				else
@@ -700,7 +696,6 @@ public class GameScreen implements Screen {
 	}
 
 	public void preparebarre(String caller, int count) {
-		//map.fillempty(53);
 		map.tempclear();
 		menu.EraseSurtile();
 		hideInfo();
@@ -725,21 +720,17 @@ public class GameScreen implements Screen {
 			if (winSave.isVisible())
 				readsaved();
 		} else if (caller == "save") {
-			Gdx.app.log("save", "Ok");
 			Gdx.app.debug("Barre", "Sauvegarde de la grille.");
 			Gdx.app.debug("Barre", AssetLoader.Datahandler.user().toString());			
-			AssetLoader.Datahandler.user().setGrid(0, level.id, level.Grid);
+			worlds.SaveGrid();
 			readsaved();
 		} else if (caller == "levels") {
 			Gdx.app.debug("Barre", "Affichage des niveaux.");
-			AssetLoader.Datahandler.user().setGrid(0, level.id, "LAST",
-					this.level.Grid);
-			((Game) Gdx.app.getApplicationListener())
-					.setScreen(new LevelScreen(level.aWorld));
+			worlds.SaveLastGrid();
+			((Game) Gdx.app.getApplicationListener()).setScreen(new LevelScreen(worlds));
 		} else if (caller == "tree") {
 		} else if (caller == "exits") {
-			AssetLoader.Datahandler.user().setGrid(0, level.id, "LAST",
-					this.level.Grid);
+			worlds.SaveLastGrid();
 			Gdx.app.exit();
 		} else if (caller == "screen") {
 			DisplayMode currentMode = Gdx.graphics.getDesktopDisplayMode();
@@ -799,7 +790,6 @@ public class GameScreen implements Screen {
 
 	public void preparemenu(int menuitem) {
 		map.tempclear();
-		//map.fillempty(53);
 		horizbar.unSelect();
 		menu.setPageType(0,menuitem);		
 		nextpage.setDisabled(menu.isNextEmpty());
@@ -820,8 +810,7 @@ public class GameScreen implements Screen {
 		info_research.setVisible(transmuter.getResearch() > 0);
 		info_research.setText(String.valueOf(transmuter.getResearch()));
 		info_activation.setVisible(transmuter.isActivable());
-		info_activation.setText(String.valueOf(transmuter
-				.getMaxActivationLevel()));
+		info_activation.setText(String.valueOf(transmuter.getMaxActivationLevel()));
 		info_up_cycle.setVisible(transmuter.isUpgradableCycle());
 		info_up_nrj.setVisible(transmuter.isUpgradableNrj());
 		info_up_temp.setVisible(transmuter.isUpgradableTemp());
@@ -846,6 +835,8 @@ public class GameScreen implements Screen {
 				AssetLoader.Atlas_level.findRegion("jauge"
 						+ transmuter.getUpgradeRayon()));
 		info_up_rayonval.setColor(AssetLoader.Levelcolors[2]);
+		info_up.setVisible(transmuter.isUnlockable(0)||transmuter.isUpgradable(0));
+		
 	}
 
 	public void hideInfo() {
diff --git a/core/src/fr/evolving/screens/LevelScreen.java b/core/src/fr/evolving/screens/LevelScreen.java
index 86be848..0ea71e9 100644
--- a/core/src/fr/evolving/screens/LevelScreen.java
+++ b/core/src/fr/evolving/screens/LevelScreen.java
@@ -18,7 +18,9 @@ import com.badlogic.gdx.scenes.scene2d.ui.Label;
 import com.badlogic.gdx.scenes.scene2d.ui.Table;
 import com.badlogic.gdx.scenes.scene2d.ui.TextArea;
 import com.badlogic.gdx.scenes.scene2d.ui.TextButton;
+import com.badlogic.gdx.scenes.scene2d.utils.ChangeListener;
 import com.badlogic.gdx.scenes.scene2d.utils.ClickListener;
+import com.badlogic.gdx.scenes.scene2d.utils.ChangeListener.ChangeEvent;
 import com.badlogic.gdx.utils.Array;
 
 import fr.evolving.UI.ButtonLevel;
@@ -30,6 +32,8 @@ import fr.evolving.assets.AssetLoader;
 import fr.evolving.assets.InitWorlds;
 import fr.evolving.assets.Preference;
 import fr.evolving.automata.Level;
+import fr.evolving.automata.Worlds;
+import fr.evolving.automata.Worlds.State;
 import fr.evolving.database.Base;
 import fr.evolving.renderers.LevelRenderer;
 
@@ -51,48 +55,18 @@ public class LevelScreen implements Screen {
 	private ServerList Statdata, Userdata, Gamedata;
 	private Worldlist Worlddata;
 	private Label Statdatalabel, Userdatalabel, Gamedatalabel, Worlddatalabel;
-	private Array<Level> thelevels;
 	private TextArea TextDescriptive;
-	public int world;
+	public Worlds worlds;
 	private Objectives Victory;
 	public ButtonLevel selected;
 
-	public int getMaxWorld() {
-		int max = 0;
-		for (Level level : thelevels)
-			if (level != null && level.aWorld > max)
-				max = level.aWorld;
-		return max;
-	}
 
 	public void play() {
-		if (!AssetLoader.Datahandler.verifyall())
-			Gdx.app.debug(getClass().getSimpleName(),
-					"Pilotes de bases de donnée défaillant.");
-		else {
-			Gdx.app.debug(getClass().getSimpleName(),
-					"Chargement des mondes depuis la base.");
-			try {
-				if (world < 0)
-					world = 0;
-				thelevels = AssetLoader.Datahandler.game().getworld(
-						Preference.prefs.getString("world"));
-				/*
-				 thelevels= InitWorlds.go();
-				 AssetLoader.Datahandler.game().setworld
-				 (thelevels,Preference.prefs.getString("world"));
-				 */
-				loadWorld(world);
-				Previous.setVisible(true);
-				Next.setVisible(true);
-				buttonPlay.setVisible(true);
-				TextDescriptive.setVisible(true);
-			} catch (Exception e) {
-				Previous.setVisible(false);
-				Next.setVisible(false);
-				buttonPlay.setVisible(false);
-				TextDescriptive.setVisible(false);
-			}
+		if (worlds.getState()!=State.notloaded && worlds.getState()!=State.databasefailed) {
+			Gdx.app.debug(getClass().getSimpleName(),"Afficher le monde 0");
+			if (worlds.getWorld() < 0)
+				worlds.setWorld(0);
+			worlds.Forcereload();
 		}
 	}
 
@@ -180,8 +154,7 @@ public class LevelScreen implements Screen {
 		buttonConnect.setVisible(true);
 		buttonStat.setVisible(true);
 		SetButtonStat();
-		if (Preference.prefs.contains("world"))
-			play();
+		play();
 	}
 
 	public void SetButtonConnect() {
@@ -217,7 +190,7 @@ public class LevelScreen implements Screen {
 		buttonPlaythis.setVisible(false);
 	}
 
-	public void loadWorld(int aworld) {
+	public void loadWorld() {
 		int i = 0;
 		if (buttonLevels != null)
 			for (int j = 0; j < 10; j++) {
@@ -228,14 +201,13 @@ public class LevelScreen implements Screen {
 			}
 		buttonLevels = null;
 		buttonLevels = new ButtonLevel[10];
-		for (Level level : thelevels) {
-			if (level != null && level.aWorld == aworld) {
+		for (Level level : worlds.getLevels()) {
+			if (level != null) {
 				if (level.Name.isEmpty())
 					level.Name=AssetLoader.language.get("[level"+(level.aWorld+1)+"/"+(level.aLevel+1)+"-name]");
 				if (level.Description.isEmpty())
 					level.Description=AssetLoader.language.get("[level"+(level.aWorld+1)+"/"+(level.aLevel+1)+"-desc]");		
-				buttonLevels[i] = new ButtonLevel(level, true,
-						AssetLoader.ratio);
+				buttonLevels[i] = new ButtonLevel(level, true, AssetLoader.ratio, true);
 				Gdx.app.debug(getClass().getSimpleName(), "Ajout du niveau :"
 						+ level.Name + " N°" + String.valueOf(level.aLevel));
 				buttonLevels[i++].addListener(new ClickListener() {
@@ -278,14 +250,43 @@ public class LevelScreen implements Screen {
 			}
 		}
 		Gdx.app.debug(getClass().getSimpleName(), "Mise en place du level 0.");
-		world = world;
-		buttonLevels[0].setChecked(true);
+		buttonLevels[0].setChecked(true); 
 		showlevel(buttonLevels[0]);
 	}
 
-	public LevelScreen(int aworld) {
-		Gdx.app.log("level", "Ok");
-		this.world = aworld;
+	public LevelScreen(Worlds aworlds) {
+		this.worlds = aworlds;
+		worlds.addListener(new ChangeListener() {
+			@Override
+			public void changed(ChangeEvent event, Actor actor) {
+				if (worlds.getState()!=Worlds.State.notloaded && worlds.getWorld()>=0)
+				{
+					LevelScreen.this.loadWorld();
+					if (buttonLevels!=null)
+						for (int j = 0; j < 10; j++)
+						{
+							if (buttonLevels[j]!=null) {
+								buttonLevels[j].setChecked(false);
+								if (worlds.getInformations()!=null && buttonLevels[j].level.id == worlds.getInformations().id) {
+									selected=buttonLevels[j];
+									selected.setChecked(true);
+									break;
+								}
+							}
+						}
+					Previous.setVisible(true);
+					Next.setVisible(true);
+					buttonPlay.setVisible(true);
+					TextDescriptive.setVisible(true);
+				}
+				else {
+					Previous.setVisible(false);
+					Next.setVisible(false);
+					buttonPlay.setVisible(false);
+					TextDescriptive.setVisible(false);
+				}
+			}
+		});
 		Gdx.app.debug(getClass().getSimpleName(),
 				"Création des elements primordiaux du screen (stage, renderer, table)");
 		stage = new Stage(AssetLoader.viewport);
@@ -371,8 +372,7 @@ public class LevelScreen implements Screen {
 				AssetLoader.Datahandler.Attach(Gamedata.getModel(),
 						Gamedata.getUrl());
 				if (!AssetLoader.Datahandler.verifyall()) {
-					dialog.Show(
-							AssetLoader.language.get("[dialog-levelscreen-errorloading]"),stage);
+					dialog.Show(AssetLoader.language.get("[dialog-levelscreen-errorloading]"),stage);
 					initlevel();
 				} else
 					menu();
@@ -389,6 +389,7 @@ public class LevelScreen implements Screen {
 				else
 					Userdata.setColor(1f, 1f, 1f, 1f);
 				Worlddata.Refresh();
+				worlds.init();
 			}
 		});
 		buttonSave = new TextButton(AssetLoader.language.get("[buttonSave-levelscreen]"), AssetLoader.Skin_ui);
@@ -399,6 +400,7 @@ public class LevelScreen implements Screen {
 				Preference.prefs.putString("userdata", Userdata.getUrl());
 				Preference.prefs.putString("gamedata", Gamedata.getUrl());
 				Preference.prefs.putString("statdata", Statdata.getUrl());
+				Preference.prefs.flush();
 				dialog.Show(
 						AssetLoader.language.get("[dialog-levelscreen-savedatabase]"),stage);
 			}
@@ -416,8 +418,8 @@ public class LevelScreen implements Screen {
 		buttonPlay.addListener(new ClickListener() {
 			@Override
 			public void clicked(InputEvent event, float x, float y) {
-				((Game) Gdx.app.getApplicationListener())
-						.setScreen(new GameScreen(selected.level));
+				worlds.setLevel(selected.level.aLevel);
+				((Game) Gdx.app.getApplicationListener()).setScreen(new GameScreen(worlds));
 			}
 		});
 		buttonStat = new TextButton(AssetLoader.language.get("[buttonStat-levelscreen]"), AssetLoader.Skin_ui);
@@ -429,7 +431,7 @@ public class LevelScreen implements Screen {
 			}
 		});
 		buttonPlaythis = new TextButton(AssetLoader.language.get("[buttonPlaythis-levelscreen]"), AssetLoader.Skin_ui);
-		buttonPlaythis.setBounds(1480, 50, 190, 40);
+		buttonPlaythis.setBounds(1480, 50, 230, 40);
 		buttonPlaythis.addListener(new ClickListener() {
 			public void clicked(InputEvent event, float x, float y) {
 				if (!AssetLoader.Datahandler.verifyall())
@@ -438,8 +440,7 @@ public class LevelScreen implements Screen {
 					if (Worlddata.getSelected() == null)
 						dialog.Show(AssetLoader.language.get("[dialog-levelscreen-errornoworld]"), stage);
 					else {
-						Preference.prefs.putString("world",
-								(String) Worlddata.getSelected());
+						worlds.set((String) Worlddata.getSelected());
 						Preference.prefs.flush();
 						play();
 					}
@@ -462,13 +463,10 @@ public class LevelScreen implements Screen {
 		Next.addListener(new ClickListener() {
 			@Override
 			public void clicked(InputEvent event, float x, float y) {
-				if (world < getMaxWorld()) {
-					world++;
-					loadWorld(world);
-				}
+				worlds.NextWorld();
 				Gdx.app.debug(event.getListenerActor().toString(),
-						"World:" + String.valueOf(world) + " Maxworld:"
-								+ String.valueOf(getMaxWorld()));
+						"World:" + String.valueOf(worlds.getWorld()) + " Maxworld:"
+								+ String.valueOf(worlds.getMaxWorlds()));
 			}
 		});
 		Previous = new ImageButton(AssetLoader.Skin_level, "Previous");
@@ -476,13 +474,10 @@ public class LevelScreen implements Screen {
 		Previous.addListener(new ClickListener() {
 			@Override
 			public void clicked(InputEvent event, float x, float y) {
-				if (world > 0) {
-					world--;
-					loadWorld(world);
-				}
+				worlds.PreviousWorld();
 				Gdx.app.debug(event.getListenerActor().toString(),
-						"World:" + String.valueOf(world) + " Maxworld:"
-								+ String.valueOf(getMaxWorld()));
+						"World:" + String.valueOf(worlds.getWorld()) + " Maxworld:"
+								+ String.valueOf(worlds.getMaxWorlds()));
 			}
 		});
 		cout = new ImageTextButton("5", AssetLoader.Skin_level, "cout");
@@ -530,7 +525,7 @@ public class LevelScreen implements Screen {
 		Userdata.Refresh();
 		Gamedata.Refresh();
 		Gdx.app.debug(getClass().getSimpleName(), "Affichage du menu.");
-		if (aworld != -1)
+		if (worlds.getWorld() != -1)
 			level();
 		else
 			menu();
@@ -553,6 +548,7 @@ public class LevelScreen implements Screen {
 	public void show() {
 		Gdx.app.log("*****", "Affichage du choix des mondes & niveaux.");
 		table.setFillParent(true);
+		stage.addActor(worlds);
 		stage.addActor(MenuSolo);
 		stage.addActor(MenuMulti);
 		stage.addActor(MenuScenario);
diff --git a/core/src/fr/evolving/screens/SplashScreen.java b/core/src/fr/evolving/screens/SplashScreen.java
index 0ce9e14..41717ea 100644
--- a/core/src/fr/evolving/screens/SplashScreen.java
+++ b/core/src/fr/evolving/screens/SplashScreen.java
@@ -10,6 +10,8 @@ import com.badlogic.gdx.scenes.scene2d.actions.Actions;
 import com.badlogic.gdx.scenes.scene2d.ui.Image;
 
 import fr.evolving.assets.AssetLoader;
+import fr.evolving.assets.Preference;
+import fr.evolving.automata.Worlds;
 import fr.evolving.game.main;
 
 public class SplashScreen implements Screen {
@@ -48,8 +50,7 @@ public class SplashScreen implements Screen {
 				}), Actions.run(new Runnable() {
 					@Override
 					public void run() {
-						((Game) Gdx.app.getApplicationListener())
-								.setScreen(new LevelScreen(-1));
+						((Game) Gdx.app.getApplicationListener()).setScreen(new LevelScreen(new Worlds(Preference.prefs.getString("world"))));
 					}
 				})));
 	}